Filter-frame.



PATENTED AUG. 18, 1908.

G. H. ULBVENGER.

FILTER FRAME.

APPLICATION FILED OGT. 30,1907.

2 SHEETSSHEET 1.

E'Jvweutoz l vfimemco QM WM No. 896,436. PATENTED AUG. 18, 1908.

G. H. OLEVENGER.

FILTER FRAME.

APPLICATION FILED 00w. 30,1907.

' 2 SHEETS-SHEET 2.

MW Gummy) UNITED STATES PATENT OFFICE.-

GA'LEN HOWELL OLEVENGER, OF PALO ALTO, CALIFORNIA, ASSIGNOR TO THEBUTTERS PATENT VACUUM FILTER COMPANY, INC., A CORPORATION OF NEVADA.

FILTER-FRAME i No. 896,436.

Specification of Letters Patent.

- Patented Aug. 18, 1908.

Application filed October 30, 1907. Serial No. 399,929.

- The object of the invention is to simplify 1 the construction of thefilter and particularly to provide means for the revention. of theaccumulationv within the ter of any sediment which may pass through thefilterv cloth.

' Certain other objects will also be apparent in connection with thedetailed description of the device.

In the accompanying drawings, Figure 1 is a face view partly 1 brokenaway to'show the interior construction; Fig. 2 is an enlarged crosssertionon the line 2' 2 of Fig.

1; Fig. '3 is an. enlarged cross section on'the line 33 of Fig. 1; andFig. 4 is an enlarged cross section on the lines 44 of Fig. 1.

\ In its preferred form the invention pro.-

vides a filter frame having a filler plate or backing for the filtercloth, this filler plate or backing having its, outer surfaces providedwith interconnecting grooves. The filtrate passing through the filtercloth is '35 thus afiorded a free exit by straight channels 1 so thatany solid material hat passes'the filter cloth, passes out with thesolution instead of lodging 'in the interior of thefilter. This fillerplate "or backing isbuilt up of 40 boards firmly screwed together, theseboards runnin longitudinally on one side of the filler p ate andtransversely on the other side. With this arrangement any swelling orwarping of the wood is provided against,

and an exceedingly strong and light con struction results.

Referring to Fig. 1, B is the upper-member of a rectangular frame,withln which is mounted the filler plate or backing before referred to.As will be seen from the drawing,"a series of boards C are secured by;screws e-to a series of transversely arranged boards 1). Both sets ofboards 0 and D are provided with longitudinal-and trans- I vversegrooves on their outer s 1 1.rfa'ces.-''- ;Be'

tween theboards of the several sets is left a s ace to provide forthe'further swelling of t e frame when it becomes wet. This filler platemade up of cross strips or boards is suspended or supported in thefollowing manner: Secured to the frame at one end and to the filler lateat the other end are a series of lugs mortised in flush with the surfaceof both the filler plate and the frame. At the bottom and one side ofthe frame these lugs (55 E are fastened to both the filler plate and theframe. At the otherside and top, similar lugs E are fastened only at oneend to the filler plate as shown in cross-section in Fig. 2. By thisarrangement the filler plate 7 v is free to expand at one side and atthe top, and this provides for any inequality of swell- Y ing of thefiller plate and the frame. Afterv the filler plate is mounted inposition within. the frame, a space is left between all sides of thefiller plate and the frame.

The bottom piece F of the frame is provided with a groove, and thisgroove together with the space which is left between the bottom of thefiller late and the frame, serves 5 as a passageway or the solution thatdrainsfrom the surface of the filler plate. The

by battens J, a stri of blanket covered with tar being inserted etweenthe canvas and tlie'frarne at the top and sides as'shown at K-(Figs. 2and 3).; The battens are secured in place by headed bolts M having attheirouter ends. longitudinal I slots, through which wedges 'or'cottersN are "driven, the same 5 means of fastening being used to secure thecleats .-L.. These cleats L are mounted as shown for thepurpose ofsustaining the can vas when areverse'current of wash water or otherfluidunder pressure is force'dinto the inside of-the filter to wash offdeposits. The pipe G passes throughthetop member of the frame Band issecured to an .apertured and threaded plate on the to of the frame i Inthe operation of t e device'it will be 5 seen that during 7 thefiltering operation,

-whether this be produced by 'suction from the inside or-press'ure fromthe outside, the canvas H ispressed against andsupported by the groovedinterior filling plate, the grooves access to the surfaces of the fillerplate.

in the filler plate allowing the filtrate and any sediment w straightgrooves and out through the pipe G When pressure is applied to theinterior of the filterframe, the cleats restrain and support the canvasso that it cannot be blown out, torn or burst open. For this reason thecleats may be placed at frequent intervals. When it is-desired to openthe filter for the pur oses of cleaning it, the Wedges canbe rea ilydriven out of the ends of the bolts and the canvas removed, therebyalfording lf i'lee 1s filler plate can, of course, be readily removedfrom the frame by unbolting the-frame.

made ofwood, it may be made of any other suitable material. It will alsobe apparent that by removing the battens and cleats, the.

- filter cloth can be taken off, cleaned as a Whole,

s and easily replaced. I

' I claim and desire to obtain by Letters Patent the-following:

H 1; A filler plate fora filter frame made up of spaced stripscrossedand secured together and havinginter-c'onnecting grooves on their outersurfaces.

2. A filler plate for a filter frame made up of spaced Wooden stripscrossed and secured together, and having inter connecting grooves ontheir outer surfaces. 7 3. A filter frame having a filler plate ofexpansible materialslidably secured thereon,

and adjustable in the frame in the plane ofp specification in thepresence of two subscribsaid plate;

' 4'. A filter frame having a fillerv plate rigidly secured at one sideand bottom and slidably secured at the other side and the top.

' '5. A filter frame comprising a frame, a

filler plate Within the frame having transverse and longitudinal ch maypass through the meshes of the canvas to be carried off through thesecuring the medium to the frame. 1

-While I have described this filler plate as mg Witnesses.

interconnecting grooves on its outer surface, a filtering mediumsurrounding. the filler plate, and means for detacha'bly securing thefiltering medium to the top and ends of the frame.

6. A Tr-I116, a filler plate spaced therefrom, lugs secured to the plateand frame, and located at the bottom and one side, and lugs,

.secured tothe plate and slidably engaging the frame at the topand'other side.

7. A filter frame, a filler plate within the frame composed of crossedstrips of wood.

having interconnecting grooves on their outer surfaces, lugs secured tothe plate for expansibly securing the plate to the frame, a filteringmedium, and 'means for detachablythe medium to the frame, anda pipepassing into the interior of the frame.

9. A filter frame, a filler plate within the a frame composed of crossedstrips of wood secured together and havinlgainter-connecting ces, lugsrigidly grooves on their outer su securing the plate to the frame at oneside and the bottom, and lugs secured to the plate and slidably engagingthe frame at the top,

and other s1de, a filtering medium detachably secured to the frame, anda pipe passing into the. interior of the frame.

In testimony whereof I have signed this GALEN HOWELL 'GLEVENGER.

Witnesses? o En. D. LACHMAN,

GLAYTON BELKNAP.

